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MOTORIZED CHANGE-OVER AND TRANSFER SWITCHES, OTM_C

If a new command is given before the switch has reached the position of the pre-

vious command, the fuse (F1) may operate.

Figure 6.3 Impulse control

8.1.1 Impulse control

When using impulse control, the change-over switch is operated by electric impulses. When you press

the control button, the change-over switch is driven to the corresponding position (I, 0, II). The control

impulse must last more than 100ms to take effect. A new command cannot be given until the change-

over switch has reached the position of the previous command. Figure 8.3 shows the operation of the

change-over switch with impulse control.

I - position

0 - position

I+II (_CL)

II -position

I - command

II - command

0 - command

I+II (_CL)

I II

>100 ms

A04130

Figure 8.3 Impulse control

3. Operate the motorized change-over switch with the push-buttons or selector switch via impulse

control or continuous control.

Information

ABB OTM C Series User Manual

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